APA (7th ed.) Citation

Low, O. (1973). A new certificate of proficiency English: Course for foreign students with use of English. Arnold.

Chicago Style (17th ed.) Citation

Low, Ona. A New Certificate of Proficiency English: Course for Foreign Students with Use of English. London: Arnold, 1973.

MLA (9th ed.) Citation

Low, Ona. A New Certificate of Proficiency English: Course for Foreign Students with Use of English. Arnold, 1973.

Warning: These citations may not always be 100% accurate.